Yes, don't leave any appliances on when you're not there to supervise. I know a family whose house burned to the ground when they went to church on Sunday, leaving either the washer or dryer running (I forget which it was). And there was a famous football player years ago whose very large home burned to the ground when no one was home, and the cause was traced to a plugged-in but not in use toaster! I unplug as many appliances as possible when not is use. You don't realized you're entrusting everything you own to a measly $10 appliance, but you really are.